=for apidoc Am|STRLEN|HvNAMELEN|HV *stash
Returns the length of the stash's name.
+Disfavored forms of HvNAME and HvNAMELEN; suppress mention of them
+=for apidoc Cmh|char*|HvNAME_get|HV* stash
+=for apidoc Amh|I32|HvNAMELEN_get|HV* stash
+
=for apidoc Am|unsigned char|HvNAMEUTF8|HV *stash
Returns true if the name is in UTF-8 encoding.